Here, command1 will run on the 2020-01-01T00:00:00, command2 will run every 3 years on the first of January at midnight, it will run so on 2019, 2022, 2025, ... . command3 does the same as command2 but has one year offset, i.e. 2020, 2023, 2026, ...
note: don't forget that you have to escape the <percent>-character (%) in your crontab file:
The "sixth" field (the rest of the line) specifies the command to be run. The entire command portion of the line, up to a newline or a "%" character, will be executed by /bin/sh or by the shell specified in the SHELL variable of the cronfile. A "%" character in the command, unless escaped with a backslash (\), will be changed into newline characters, and all data after the first % will be sent to the command as standard input.
Crontab (5) file format has no YEAR field. You could try running a cron job @yearly (at 00:00 on New Year's day) which looks at the current year using date(1) and updates the current crontab file to one appropriate for the new year.
标准 cron 不支持年份字段，但值得注意的是，某些实现支持带有第六个 year 字段的扩展 crontab 格式，例如 nnCron。并非每个 cron 都是生而平等的。
Standard cron doesn't support a year field, but it's worth noting that some implementations support an extended crontab format with a sixth year field, such as nnCron. Not every cron is created equal.
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正如之前的文章中所指出的，您不能指定年份字段，但是可以模仿它：
这里，
command1将在 2020-01-01T00:00:00 上运行，command2将每 3 年在 1 月 1 日午夜运行一次，它将在 2019、2022、2025，... 运行。command3与command2的作用相同，但有一年的偏移，即 2020、2023、2026，...注意：不要忘记您必须在 crontab 文件中转义字符 (
%)：As indicated in earlier posts, you cannot indicate a year field, it is, however, possible to mimic it:
Here,
command1will run on the 2020-01-01T00:00:00,command2will run every 3 years on the first of January at midnight, it will run so on 2019, 2022, 2025, ... .command3does the same ascommand2but has one year offset, i.e. 2020, 2023, 2026, ...note: don't forget that you have to escape the <percent>-character (
%) in your crontab file:Crontab (5) 文件格式没有 YEAR 字段。您可以尝试运行一个 cron 作业 @yearly（元旦的 00:00），它使用 date(1) 查看当前年份，并将当前的 crontab 文件更新为适合新一年的文件。
Crontab (5) file format has no YEAR field. You could try running a cron job @yearly (at 00:00 on New Year's day) which looks at the current year using date(1) and updates the current crontab file to one appropriate for the new year.
标准
cron不支持年份字段，但值得注意的是，某些实现支持带有第六个year字段的扩展 crontab 格式，例如 nnCron。并非每个 cron 都是生而平等的。Standard
crondoesn't support a year field, but it's worth noting that some implementations support an extended crontab format with a sixthyearfield, such as nnCron. Not every cron is created equal.这是考虑 YEAR 字段的工作..
@mart7ini
It is work for considering YEAR field..
@mart7ini